18.
Conclusions: Ionising irradiation can be a stimulating tool to obtain “functional” hydrogels from water-soluble polymeric precursors. Crosslinking degree and density can be controlled by tuning irradiation conditions, thus affecting the water retention properties of the gels. Oil insoluble fragrances can be incorporated by coupling irradiation and emulsification techniques. Hydrogel formation can prevent macroscopic phase-separation of otherwise unstable systems. The hydrogel network offers a diffusion barrier to the fragrance. Water loss kinetics may be exploited for a on-off, surface hydration regulated, release behavior .